805980909 has 8 divisors (see below), whose sum is σ = 1085281632. Its totient is φ = 532000400.

The previous prime is 805980907. The next prime is 805980941. The reversal of 805980909 is 909089508.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 805980909 - 2¹ = 805980907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805980907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1329699 + ... + 1330304.

It is an arithmetic number, because the mean of its divisors is an integer number (135660204).

Almost surely, 2^805980909 is an apocalyptic number.

It is an amenable number.

805980909 is a deficient number, since it is larger than the sum of its proper divisors (279300723).

805980909 is a wasteful number, since it uses less digits than its factorization.

805980909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660107.

The product of its (nonzero) digits is 233280, while the sum is 48.

The square root of 805980909 is about 28389.8029052686. The cubic root of 805980909 is about 930.6254354617.

The spelling of 805980909 in words is "eight hundred five million, nine hundred eighty thousand, nine hundred nine".